Hip-up exercise apparatus

ABSTRACT

According to the present disclosure, provided is a hip-up exercise apparatus. The hip-up exercise apparatus includes a frame defining an opening at one side thereof and fixing holes at both sides of upper surfaces thereof; a footrest portion disposed at the opening of the frame; a pair of pillars inserted into and coupled to the fixing holes of the frame; and a back supporter connecting upper portions of the pair of pillars and configured to support a back; and the pillars are separated from the fixing holes, are rotated downward, and are turned over, to attach rear surfaces of the pillars to upper surfaces of the frame. 
     The pillars are separated from the fixing holes, are rotated downward, are turned over, and protrusions are coupled to the fixing holes, to attach the rear surfaces of the pillars on the upper surfaces of the frame, and the footrest is moved inside the frame to a maximum position thereof through the rail, thereby minimizing volume of the hip-up exercise apparatus, facilitating storage of the hip-up exercise apparatus, and conveniently using the hip-up exercise apparatus at home.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 10-2020-0133367, filed on Oct. 15, 2020, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND 1. Field of the Disclosure

The present disclosure relates to a hip-up exercise apparatus.

2. Description of Related Art

Among body parts, hips improve his or her dressing style when users wear bottoms. Users do hip-up exercise to lift his or her hips up.

The hip-up exercise is an exercise program to intensively strengthen hip muscle tone and lift hips up. When the hips become rounded by doing the hip-up exercise, legs look relatively long.

Examples of hip-up exercises include squat, a leg lift where legs are stretched and lifted up with knees and palms put on the floor, and a grasshopper posture.

Most of the hip-up exercises are free exercises without additional apparatuses. Free exercise may develop gluteus, which is a hip muscle, to lift hips up. However, users have difficulty in doing the hip-up exercise using one's own body and get easily exhausted even with a small amount of exercise.

In order to address the problem, exercise apparatuses may be used for doing various hip-up exercises, but users have difficulty in purchasing and using the exercise apparatus at home owing to a large size and expensive cost of the exercise apparatus.

RELATED ART DOCUMENT

(Patent Document 1) KR 10-1410899

(Patent Document 2) KR 10-2016-0058254

(Patent Document 3) KR 10-2017-0007896

(Patent Document 4) KR 10-1351985

SUMMARY OF THE DISCLOSURE

The present disclosure is conceived to address the above-described problems and provides a hip-up exercise apparatus in which pillars are separated from fixing holes, are rotated downward, are turned over, and protrusions are coupled to the fixing holes to attach rear surfaces of the pillars to upper surfaces of a frame, and a footrest portion is moved into the frame to maximum position thereof through rails.

The present disclosure also provides a hip-up exercise apparatus capable of freely moving to an inside and outside of the frame in a longitudinal direction of the frame using the rail portions and coupling rails in a taken-out state and an overlapped state.

The present disclosure further provides a hip-up exercise apparatus in which a first through-hole is eccentric to one side of the pillar and a second through-hole is eccentric to one side of the frame to block rotation of the pillars about fixing pins during exercise.

The present disclosure also provides a hip-up exercise apparatus in which a pillar may be disposed between a hook and a fixing hole.

The hip-up exercise apparatus of the present disclosure includes a frame defining an opening at one side thereof and fixing holes at both sides of an upper surface thereof; a footrest portion disposed at the opening of the frame; a pair of pillars inserted into and coupled to the fixing holes of the frame; and a back supporter connecting upper portions of the pair of pillars and configured to support a back; and the pillars are separated from the fixing holes, are rotated downward, and are turned over, and are coupled to the fixing holes to attach rear surfaces of the pillars on upper surfaces of the frame.

The pillar defines the rear surface thereof and includes a protrusion protruding from a lower portion of the rear surface thereof and the protrusion and the lower portion of the pillar each have a shape corresponding to a shape of the fixing hole such that the protrusion is inserted into and coupled to the fixing hole when the rear surface of each of the pillars is attached and coupled to the upper surface of the frame.

The hip-up exercise apparatus includes a rail portion disposed between the insertion groove and the supporter to move the supporter in a forward and rearward direction, the frame includes insertion grooves into which facing inner surfaces of the frame are inserted, the footrest portion includes a footrest to support feet of user and supporters disposed at both sides of a lower surface of the footrest.

In addition, the hip-up exercise further includes a fixing pin configured to couple the frame and the pillar or the frame and the protrusion through each of a first through-hole and a second through-hole, the first through-hole is defined at the lower portion of the pillar and the protrusion, the frame defines the second through-hole communicating with the first through-hole when the lower portion of the pillar and the protrusion are each inserted into the second through-hole, and the first through-hole is eccentric to one side of the pillar from a center of the pillar in a longitudinal direction of the pillar and the second through-hole is eccentric to one side of the frame from a center of the frame in a longitudinal direction of the frame.

The hip-up exercise apparatus further includes; a connector connecting the pair of pillars and disposed below the back supporter, a lower surface of the connector contacts the upper surface of the frame when the lower portions of the pillars are inserted into the fixing holes, a rear surface of the connector contacts the upper surface of the frame when the protrusion is inserted into the fixing hole, and the lower surface and the rear surface of the connector are each supported by the upper surface of the frame when the pillar is coupled to the fixing hole in a vertical state or a folded state to inhibit swinging of the pair of pillars and increase a force for coupling the pillars to the frame.

The hip-up exercise apparatus further includes a hook disposed at a middle portion of the upper surface of the frame, contacting an upper surface of the pillar when the protrusion is inserted into the fixing hole of the frame and configured to couple to a strap; and when the rear surface of the pair of pillars is attached to and coupled to the upper surface of the frame, an upper end of the pair of pillars contacts the hook and the pillar is disposed between the hook and the fixing hole.

The rail portion includes a first rail inserted into in the insertion groove, a lever disposed at one side of the first rail, having a first end rotatable about a first hinge and a second end protruding in one direction of the first rail, an engaging portion disposed at a middle portion of the first rail and rotatable about a second hinge, a link member connecting the lever and the engaging portion and moved in a rotational direction thereof when the lever rotates about the first hinge, a second rail facing the link member, slidable in a longitudinal direction of the first trail, and defining, at one side thereof, a first engaging protrusion caught by the engaging portion and configured to inhibit separation from the first rail, and a third through-hole at a second end thereof, a rotating member disposed at the second side of the second rail, rotatable about a third hinge, defining an insertion protrusion inserted into the third through-hole, protruding vertically, rotatable by a vertical width of the third through-hole, defining a middle portion thereof having a vertical width increased toward a second end of the second rail from the third hinge and contacting a second side of the first rail and rotated when the first rail slides into the second rail, and disposed between an upper portion and a lower portion of the first rail, and a third rail facing the insertion protrusion of the rotating member, slidable in a longitudinal direction of the second rail, and defining a second engaging protrusion at a middle portion thereof, and when the first rail is separated from the rotating member, the rotating member rotates and the insertion protrusion is caught by the second engaging protrusion and when the rotating member is disposed between the upper portion and the lower portion of the first rail, the second engaging protrusion passes through the insertion protrusion.

The lever defines a third engaging protrusion protruding toward the third rail at a middle portion thereof, the third rail defines a fourth engaging protrusion protruding toward the second rail at one side thereof and being caught by the third engaging protrusion and a supporting protrusion protruding toward the second rail at a second side thereof, when the second rail slides into the third rail and the first side of the first rail slides to the first side of the third rail, the third engaging protrusion is caught by a first end of the fourth engaging protrusion, and when the lever is rotated, the third engaging protrusion passes through the fourth engaging protrusion, the third engaging protrusion passes through the fourth engaging protrusion and the second end of the first rail slides to and is supported by the supporting protrusion of the third rail, and when the rotated lever is returned back to original position thereof, the third engaging protrusion is caught by a second end of the fourth engaging protrusion to couple the first rail to the second rail and the third rail in an overlapped state.

The engaging portion defines an engaging groove into which the first engaging protrusion is inserted, when the first rail is taken out from the second rail and the first engaging protrusion is inserted into the engaging groove, the first rail and the second rail are coupled to each other in the taken-out state, and when the lever rotates, the link member moves in the first direction of the first rail and the engaging portion is rotated about the second hinge and the first engaging protrusion is separated from the engaging groove to slide the first rail and the second rail.

The first rail is taken out from the first side of the second rail and the first engaging protrusion is inserted into and coupled to the engaging groove. The rotating member is separated from the first rail, is rotated, and the insertion protrusion is caught by and coupled to the second engaging protrusion to couple the first rail, the second rail, and the third rail in the taken-out state.

The third rail defines fifth engaging protrusions protruding from an upper surface and a lower surface at a first side thereof, the second rail defines sixth engaging protrusions protruding from an upper surface and a lower surface thereof and protruding between the second engaging protrusion and the fifth engaging protrusion, and when the second rail slides in one direction thereof, the sixth engaging protrusion is caught by the fifth engaging protrusion to block the separation of the second rail from the third rail.

The hip-up exercise apparatus may minimize volume thereof, facilitate storage thereof, and may be conveniently used at home.

The rails are coupled to one another when the rails are taken out from and overlapped with one another to enable stable exercise and easy storage of the hip-up exercise apparatus.

The pillars are not rotated about the fixing pins during exercise, thereby reducing tension at the back supporter and stably and conveniently doing the exercise.

In addition, when the pillars are folded, upper ends of the pillars are supported by and not released from hooks, and thus, the pillars are fixed in a non-swinging state, thereby providing stable and easy storage of the hip-up exercise apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 2 is an exploded perspective view showing a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 3 is a cross-sectional view showing a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 4 shows operation of a rail portion of a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 5 shows a folded state of a pillar of a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 6 is a side view showing a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 7 is a perspective view showing a rail portion of a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 8 is an exploded perspective view showing a rail portion of a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 9A to 9C are side views showing a first rail, a second rail, and a third rail of a hip-up exercise apparatus according to an embodiment of the present disclosure.

FIG. 10A to 10D are side views showing the operation state of a rail portion of a hip-up exercise apparatus according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EXEMPLARY IMPLEMENTATIONS

Some embodiments of the present disclosure and implementation methods thereof will be clarified through following embodiments described with reference to the accompanying drawings. Example embodiments may, however, be embodied in different manners and should not be construed as limited to example embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Further, the present disclosure is only defined by scopes of claims. Like reference numerals refer to like elements throughout the disclosure.

Hereinafter, a hip-up exercise apparatus according to embodiments of the present disclosure is described with reference to drawings.

Referring to FIGS. 1 to 6, the hip-up exercise apparatus according to the present disclosure includes a frame 10, a footrest portion 20, a pillar 30, and a back supporter 40.

The frame 10 includes an opening 11 at one side thereof and fixing holes 12 at both sides of an upper surface thereof.

In addition, the frame 10 includes the opening 11 and has a U-shape. The frame 10 includes insertion grooves 13 into which facing inner surfaces of the frame 10 are inserted.

The footrest portion 20 is disposed at the opening 11 of the frame 10. The footrest portion 20 includes a footrest 21 to support feet of user and a supporter 22 disposed at both sides of a lower surface of the footrest 21.

The supporter 22 is coupled to the footrest 21 and is inserted into the frame 10 through the opening 11. Further, the footrest 21 is inserted into the opening 11 to arrange an upper surface of the footrest 21 in parallel to an upper surface of the frame 10.

A pair of pillars 30 is provided and is inserted into and coupled to each of fixing holes 12 of the frame 10. In addition, the pillar 30 defines a rear surface thereof and includes a protrusion protruding from a lower portion of the rear surface thereof.

The back supporter 40 connects upper portions of the pair of pillar 30 and supports a back. For example, the user may do hip-up exercise by moving hips vertically with feet being supported by the footrest portion 20 and the back being supported by the back supporter 40.

When the user does not use the hip-up exercise apparatus, the user may store the hip-up exercise apparatus with minimal volume.

After the pillars 30 are separated from the fixing holes 12, the pillars 30 are folded downward and are turned over. In this state, the protrusions 31 are coupled to the fixing holes 12 to attach the rear surfaces of the pillars 30 to the upper surfaces of the frame 10. Accordingly, the pillar 30 and the back supporter 40 are folded on the upper surfaces of the frame 10.

The protrusion 31 and the lower portion of the pillar 30 may each have a shape corresponding to that of the fixing hole 12 such that the protrusion 31 is inserted into and coupled to the fixing hole 12 to attach the rear surface of the pillar 30 to the upper surface of the frame 10, but the present disclosure is not limited thereto.

The hip-up exercise apparatus according to the present disclosure further includes rail portions 50.

Each of the rail portions 50 is disposed between the insertion groove 13 and the supporter 22 to move the supporter in a forward and rearward direction and a structure and an operation state of the rail portion 50 are described below in detail with reference to FIGS. 7 to 10D.

A first through-hole 32 is defined at the lower portion of the pillar 30 and the protrusion 31. The first through-hole 32 defined at the pillar 30 is eccentric to the front with respect to a forward and rearward direction of the pillar 30 and the first through-hole 32 defined at the protrusion 31 is eccentric upward with respect to an upward and downward direction of the protrusion 31.

The frame 10 includes a second through-hole 14 communicating with the first through-hole 32 when the lower portion of the pillar 30 and the protrusion 31 are inserted.

The hip-up exercise apparatus of the present disclosure further includes fixing pins 60.

Each of the fixing pins 60 passes through the first through-hole 32 and the second through-hole 14 to couple the frame 10 and the pillar 30 or the frame 10 and the protrusion 31. In addition, the first through-hole 32 is eccentric to one side of the pillar 30 from a center of the pillar 30 in a longitudinal direction of the pillar 30 and the second through-hole 14 is eccentric to one side of the frame 10 from a center of the frame 10 in the longitudinal direction of the frame 10. When the lower portion of the pillar 30 is inserted into the fixing hole 12 and the pillar 30 is disposed vertically, the fixing pin 60 may fix the vertical state of the pillar 30.

The fixing pin 60 couples the frame 10 and the pillar 30 or the frame 10 and the protrusion 31 through the first through-hole 32 and the second through-hole 14 eccentric to the front thereof to stably maintain the fixed state of the pillar 30 when the user does exercise.

For example, if the first through-hole 32 is defined at the center of the pillar 30 and the second through-hole 14 is defined at the center of the frame 10, the pillar 30 may rotate about the centers thereof. If the pillars 30 move, the user may do the hip-up exercise in an unstable state and experience tension. Accordingly, the first through-hole 32 is advantageously eccentric to the front of the pillar 30 and the second through hole 14 is advantageously eccentric to the front of the frame 10 to block the rotation of the pillar 30.

The hip-up exercise apparatus according to the present disclosure further includes a connector 70 and hooks 80.

The connector 70 connects the pair of pillars 30 and is disposed below the back supporter 40. In addition, a lower surface of the connector 70 contacts the upper surface of the frame 10 when the lower portion of the pillar 30 is inserted into the fixing hole 12. Further, a rear surface of the connector 70 contacts the upper surface of the frame 10 when the protrusion 31 is inserted into the fixing hole 12.

That is, when the pillar 70 is coupled to the fixing hole 12 in the vertical state or the folded state, the lower surface and the rear surface of the connector 70 are each supported by the upper surface of the frame 10 to inhibit swinging of the pair of pillars 30 and increase a force for coupling the pair of pillars 30 to the frame 10.

Each of the hooks 80 is disposed at a middle portion of the upper surface of the frame 10 and contacts the upper surface of the pillar 30 when the protrusion 31 is inserted into the fixing hole 12 of the frame 10 and may fix a strap.

In this case, when the rear surface of the pair of pillars 30 is attached and coupled to the upper surface of the frame 10, an upper end of the pair of pillars 30 contacts the hooks 80, and the pair of pillars 30 is disposed between the hook 80 and the fixing hole 12. When the pillars 30 are folded on the frame 10, for example, the rear surface of the pillar 30 contacts and is coupled to the upper surface of the frame 10 by inserting the protrusion 31 into the fixing hole 12, the pillar 30 contacts the hook 80 at the upper end thereof and is disposed between the hook 80 and the fixing hole 12. That is, the upper end of the pillar 30 is supported by the hook 80, thereby inhibiting the swinging of the pillar 30 in the forward and rearward direction thereof.

Hereinafter, the rail portion 50 is described in detail.

Referring to FIGS. 7 to 10D, the rail portion 50 includes a first rail 510, a lever 520, an engaging portion 530, a link member 540, a second rail 550, a rotating member 560, and a third rail 580.

A first direction of the rail portion 50 refers to a direction toward the lever 520 described below and a second direction of the rail portion 50 refers to a direction toward a supporting protrusion 583 of the third rail 580 described below.

The first rail 510 is disposed at the insertion groove. In this case, the position of the first rail 510 may changed with a position of the third rail 580 described below.

The lever 520 is disposed at one side of the first rail 510 and has a first end which is rotatable about a first hinge 521 and a second end protruding in the first direction of the first rail 510.

Accordingly, the user may rotate the lever 520 while grabbing the lever 520. The lever 520 may further include a spring to return the lever 520 back to original position thereof when the user releases the grip of the rotated lever 520.

The engaging portion 530 is disposed at a middle portion of the first rail 510 and rotates about a second hinge 531.

In this case, the lever 520 is disposed at one side of the first rail 510 and the engaging portion 530 is disposed at the middle portion of the first rail 510.

The link member 540 connects the lever 520 and the engaging portion 530 and moves in a rotation direction of the lever 520 when the lever 520 rotates about the first hinge 521.

For example, when the lever 520 is rotated, the link member 540 is pulled in the first direction of the first rail 510. In this case, the link member 540 pulls the engaging portion 530 while moving in a longitudinal direction of the first rail 510.

Further, the engaging portion 530 is pulled, rotates about the second hinge 531, and is separated from a first engaging protrusion 551 inserted into an engaging groove 532 described below. That is, when the engaging groove 532 is separated from the first engaging protrusion 551, the first rail 510 may be separated from the second rail 550 and slide in the second direction of the second rail 550.

The second rail 550 faces the link member 540 and is slidable in the longitudinal direction of the first rail 510.

In addition, the second rail 550 defines, at the first side thereof, a first engaging protrusion 551 caught by the engaging portion 530 to inhibit the separation of the second rail 550 from the first rail 510.

In addition, the second rail 550 includes a third through-hole 552 at the second side thereof.

In addition, the second rail 550 has a length shorter than that of the first rail 510. In addition, a third rail 580 described below has a length larger than that of the first rail 510.

The engaging groove 532 has a first end defining a round shape and a second end defining a right-angle shape. When the first rail 510 is pulled out in the first direction of the rail portion 50, the engaging portion 530 is rotated by the first engaging protrusion 551 owing to the structure of the rounded first end of the engaging groove 532 and the first engaging protrusion 551 may be coupled to the engaging groove 532.

The engaging portion 530 may further include a spring to return it back to original position thereof in order for the first engaging protrusion 551 to be coupled to the engaging groove 532 after the engaging portion 530 is rotated by the first engaging protrusion 551.

A rotating member 560 is disposed at the second side of the second rail 550 and is rotatable about a third hinge 561.

In addition, the rotating member 560 includes an insertion protrusion 562 inserted into a third through-hole 552 and protruding vertically and is rotated by a vertical width of the third through-hole 552.

In addition, the rotating member 560 has a middle portion with a vertical width increased toward a second end of the second rail 550 from the third hinge 561, and when the first rail 510 slides into the second rail 550, the second side of the first rail 510 contacts the middle portion of the rotating member 560 and the rotating member 560 rotates. In this case, the rotating member 560 is disposed between an upper portion and a lower portion of the first rail 510.

The third rail 580 faces the insertion protrusion 562 of the rotating member 560, is slidably disposed in the longitudinal direction of the second rail 550, and defines a second engaging protrusion 581 at a middle portion thereof.

When the rotating member 560 is separated from the first rail 510 and is rotated, the second engaging protrusion 581 is caught by the insertion protrusion 562. In addition, the second engaging protrusion 581 passes the insertion protrusion 562 when the rotating member 560 is disposed between the upper portion and the lower portion of the first rail 510.

When the first engaging protrusion 551 is coupled to the engaging portion 530, the rotating member 560 is separated from the first rail 510 and rotates. In this case, the insertion protrusion 562 of the rotating member 560 is caught by the second engaging protrusion 581.

In addition, when the first engaging protrusion 551 is separated from the engaging portion 530 and the first rail 510 slides in a second direction of the second rail 550, the middle portion of the rotating member 560 is pushed by the other side of the 510 and the rotating member 560 rotates. When the rotating member 560 is inserted into the first rail 510, the insertion protrusion 562 is not caught by the first engaging protrusion 551. In addition, the first engaging protrusion 551 passes through the insertion protrusion 562 to slide the first rail 510 into the second rail 550.

The lever 520 includes a third engaging protrusion 522 protruding toward the third rail 580 at a middle portion thereof.

The third rail 580 defines a fourth engaging protrusion 582 protruding toward the second rail 550 and being caught by the third engaging protrusion 522 at a first side thereof and a supporting protrusion 583 protruding toward the second rail 550 at a second thereof.

When the second rail 550 slides into the third rail 580 and the first side of the first rail 510 slides to the first side of the third rail 580, the third engaging protrusion 522 is caught by the first end of the four engaging protrusion 582, and if the lever 520 is rotated, the third engaging protrusion 522 passes through the fourth engaging protrusion 582.

In this case, the third engaging protrusion 522 passes through the fourth engaging protrusion 582 and the second side of the first rail 510 slides to and is supported by the supporting protrusion 583 of the third rail 580.

In addition, when the rotated lever 520 is returned back original position thereof, the third engaging protrusion 522 is caught by the second end of the fourth engaging protrusion 582, and the first rail 510, the second rail 550, and the third rail 580 are coupled to one another in the overlapped state.

The engaging portion 530 defines an engaging groove 532 into which the first engaging protrusion 551 is inserted.

When the first rail 510 is taken out from the second rail 550, the first engaging protrusion 551 is inserted into the engaging groove 532. In this case, the first rail 510 is coupled to the second rail 550 in the taken-out state.

When the lever 520 is rotated, the link member 540 is moved in the first direction of the first rail 510, the engaging portion 530 is rotated about the second hinge 531, and thus, the first engaging protrusion 551 is separated from the engaging groove 532. In this case, the first rail 510 and the second rail 550 are slidable with respect to each other.

Accordingly, when the first rail 510 is taken out from the first side of the second rail 550, the first engaging protrusion 551 is inserted into the engaging groove 532, is coupled to the engaging portion 530, and the rotating member 560 is separated from the first rail 510, is rotated, and the insertion protrusion 562 is caught by the second engaging protrusion 581. In this case, the first rail 510, the second rail 550, and the third rail 580 are coupled to one another in the taken-out state.

When the lever 520 is rotated, the first engaging protrusion 551 is separated from the engaging groove 532, the first rail 510 slides in the second direction of the second rail 550, and is overlapped with the second rail 550. In this case, the rotating member 560 is rotated by the second end of the first rail 510, is separated from the second engaging protrusion 581, the second rail 550 is caught by the first hinge 521 at the first side thereof, slides, together with the first rail 510, in the second direction of the third rail 580, and is overlapped with the third rail 580.

In addition, when the third engaging protrusion 522 is caught by the first end of the fourth engaging protrusion 582, the lever 520 is rotated to further slide the first rail 510 in the second direction of the third rail 580. When the lever 520 is retuned back to original position thereof, the third engaging protrusion 522 is caught by the second end of the fourth engaging protrusion 582. Accordingly, the first rail 510, the second rail 550, and the third rail 580 are coupled to one another in the overlapped state.

The third rail 580 defines fifth engaging protrusions 584 protruding from an upper surface and a lower surface thereof at one side and the second rail 550 includes sixth engaging protrusions 553 protruding form an upper surface and a lower surface thereof and protruding from the second engaging protrusion 581 and the fifth engaging protrusion 584.

When the second rail 550 slides in the first direction thereof, the sixth engaging protrusion 553 is caught by the fifth engaging protrusion 584 to block the separation of the second rail 550 from the third rail 580.

A person having ordinary skill in the art to which the present disclosure pertains will appreciate that the present disclosure may be implemented in other specific manners without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all aspects and non-limiting. The scope of the present disclosure is indicated by the scope of the claims described below rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof are included in the scope of the present disclosure. In addition, the configurations described in the above do not necessarily need to be performed in a time-series order, and even if the execution sequence of configurations and steps is changed, such a process will fall within the scope of the present disclosure when the subject matter of the present disclosure is satisfied.

DESCRIPTION OF SYMBOLS 10: Frame 11: Opening 12: Fixing hole 13: Insertion groove 14: Second through-hole 20: Footrest portion 21: Footrest 22: Supporter 30: Pillar 31: Protrusion 32: First through-hole 40: Back supporter 50: Rail portion 60: Fixing pin 70: Connector 80: Hook 510: First rail 520: Lever 521: First hinge 522: Third engaging protrusion 530: Engaging portion 531: Second hinge 532: Engaging groove 540: Link member 550: Second rail 551: First engaging protrusion 552: Third through-hole 553: Sixth engaging protrusion 560: Rotating member 561: Third hinge 562: Insertion protrusion 580: Third rail 581: Second engaging protrusion 582: Fourth engaging protrusion 583: Supporting protrusion 584: Fifth engaging protrusion 

What is claimed is:
 1. A hip-up exercise apparatus, comprising: a frame defining an opening at one side thereof and fixing holes at both sides of an upper surface thereof; a footrest portion disposed at the opening of the frame; a pair of pillars inserted into and coupled to the fixing holes of the frame; and a back supporter connecting upper portions of the pair of pillars and configured to support a back; wherein the pillars are separated from the fixing holes, are rotated downward, are turned over, and are coupled to the fixing holes to attach rear surfaces of the pillars on the upper surface of the frame.
 2. The hip-up exercise apparatus of claim 1, wherein the pillar defines the rear surface thereof and comprises a protrusion protruding from a lower portion of the rear surface thereof, wherein the protrusion and the lower portion of the pillar each have a shape corresponding to a shape of the fixing hole such that the protrusion is inserted into and coupled to the fixing hole when the rear surface of each of the pillars is attached and coupled to the upper surface of the frame.
 3. The hip-up exercise apparatus of claim 1, further comprising: a rail portion disposed between the insertion groove and the supporter to move the supporter in a forward and rearward direction, wherein the frame comprises insertion grooves into which facing inner surfaces of the frame are respectively inserted, and wherein the footrest portion comprises a footrest to support feet of a user and supporters disposed at both sides of a lower surface of the footrest.
 4. The hip-up exercise apparatus of claim 2, further comprising a fixing pin configured to couple the frame and the pillar and the frame and the protrusion through each of a first through-hole and a second through-hole, wherein the first through-hole is defined at the lower portion of the pillar and the protrusion, wherein the frame defines the second through-hole communicating with the first through-hole when the lower portion of the pillar and the protrusion are each inserted into the fixing hole, and wherein the first through-hole is eccentric to one side of the pillar from a center of the pillar in a longitudinal direction of the pillar and the second through-hole is eccentric to the one side of the frame from a center of the frame in a longitudinal direction of the frame.
 5. The hip-up exercise apparatus of claim 2, further comprising; a connector connecting the pair of pillars and disposed below the back supporter, wherein a lower surface of the connector contacts the upper surface of the frame when the lower portion of the pillar is inserted into the fixing holes, wherein a rear surface of the connector contacts the upper surface of the frame when the protrusions is inserted into the fixing hole, wherein the lower surface and the rear surface of the connector are each supported by the upper surface of the frame when the pillar is coupled to the fixing hole in a vertical state or a folded state to inhibit swinging of the pair of pillars and increase a force for coupling the pillars to the frame.
 6. The hip-up exercise apparatus of claim 2, further comprising a hook disposed at a middle portion of the upper surface of the frame, contacting an upper surface of the pillar when the protrusion is inserted into the fixing holes of the frame and configured to couple to a strap; wherein, when the rear surface of the pair of pillars is attached to and coupled to the upper surface of the frame, an upper end of the pair of pillars contacts the hook and the pillar is disposed between the hook and the fixing hole.
 7. The hip-up exercise apparatus of claim 3, wherein the rail portion comprises: a first rail inserted into the insertion groove, a lever disposed at one side of the first rail, having a first end rotatable about a first hinge and a second end protruding in one direction of the first rail, an engaging portion disposed at a middle portion of the first rail and rotatable about a second hinge, a link member connecting the lever and the engaging portion and moved in a rotational direction thereof when the lever rotates about the first hinge, a second rail facing the link member, slidable in a longitudinal direction of the first rail, and defining, at one side thereof, a first engaging protrusion caught by the engaging portion and configured to inhibit separation from the first rail, and a third through-hole at a second side thereof, a rotating member disposed at the second side of the second rail, rotatable about a third hinge, defining an insertion protrusion inserted into the third through-hole, protruding vertically, rotatable by a vertical width of the third through-hole, defining a middle portion thereof having a vertical width increased toward a second end of the second rail from the third hinge and contacting a second end of the first rail and rotated when the first rail slides into the second rail, and disposed between an upper portion and a lower portion of the first rail, and a third rail facing the insertion protrusion of the rotating member, slidable in a longitudinal direction of the second rail, and defining a second engaging protrusion at a middle portion thereof, and when the first rail is separated from the rotating member, the rotating member rotates and the insertion protrusion is caught by the second engaging protrusion and when the rotating member is disposed between the upper portion and the lower portion of the first rail, the second engaging protrusion passes through the insertion protrusion.
 8. The hip-up exercise apparatus of claim 7, wherein the lever defines a third engaging protrusion protruding toward the third rail at a middle portion thereof, wherein the third rail defines a fourth engaging protrusion protruding toward the second rail at a first side thereof and being caught by the third engaging protrusion and a supporting protrusion protruding toward the second rail at a second side thereof, wherein, when the second rail slides into the third rail and the first side of the first rail slides to the first side of the third rail, the third engaging protrusion is caught by one end of the fourth engaging protrusion, and when the lever is rotated, the third engaging protrusion passes through the fourth engaging protrusion, and wherein the third engaging protrusion passes through the fourth engaging protrusion and the second end of the first rail slides to and is supported by the supporting protrusion of the third rail, and when the rotated lever is returned back to original position thereof, the third engaging protrusion is caught by a second end of the fourth engaging protrusion to couple the first rail to the second rail and the third rail in an overlapped state.
 9. The hip-up exercise apparatus of claim 7, wherein the engaging portion defines an engaging groove into which the first engaging protrusion is inserted, wherein, when the first rail is taken out from the second rail and the first engaging protrusion is inserted into the engaging groove, the first rail and the second rail are coupled to each other in the taken-out state, and wherein, when the lever rotates, the link member moves in the first direction of the first rail and the engaging portion is rotated about the second hinge and the first engaging protrusion is separated from the engaging groove to slide the first rail and the second rail.
 10. The hip-up exercise apparatus of claim 7, wherein the third rail defines fifth engaging protrusions protruding from a upper surface and a lower surface at a first side thereof, wherein the second rail defines sixth engaging protrusions protruding from an upper surface and a lower surface thereof and protruding between the second engaging protrusion and the fifth engaging protrusion, and wherein, when the second rail slides in one direction thereof, the sixth engaging protrusion is caught by the fifth engaging protrusion to block the separation of the second rail from the third rail. 